table {
    width: 50%;
    border: 1px solid black;
    margin: 0 auto;
    border-collapse: collapse;
}

td {
    height: 50px;
    border: 1px solid black;
    text-align: center;
    vertical-align: center;
}

tbody tr:nth-child(even) {
    background-color: antiquewhite;
}
.check-box{
    border: skyblue 1px solid;
    width: 30px;
    height: 30px;
}
form{
    width: 100%;
}
.button1{
    width: 60%;
    background-color: #4CAF50; /* Green */
    border: 1px solid skyblue;
    border-radius: 20px;
    color: white;
    padding: 15px 32px;
    text-align: center;
    font-size: 16px;
    cursor: pointer;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    margin: 10px 20%;
}
.button1:hover{
    box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24), 0 17px 50px 0 rgba(0,0,0,0.19);
}
input{
    margin: 0 auto;
}